Brent Goose vs Scaly-sided Merganser
Branta bernicla comparado con Mergus squamatus
Side-by-Side Comparison
| Atributo | Brent Goose | Scaly-sided Merganser |
|---|---|---|
| Nombre científico | Branta bernicla | Mergus squamatus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Endangered |
| Longitud | — | — |
| Envergadura | 63,9 cm (25.2 in) | 51,2 cm (20.2 in) |
| Peso | 1335,0 g (47.09 oz) | 1145,8 g (40.42 oz) |
| Dieta | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dives for fish in fast-flowing East Asian rivers. Endangered; highly piscivorous with serrated bill adapted … |
| Tamaño de la puesta | 1-10 | 4-14 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Brent Goose only
Scaly-sided Merganser only
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Scaly-sided Merganser
Male gives a quiet, low grunting call; female produces a guttural, croaking series. Endangered; calls are poorly known; similar to Red-breasted Merganser but quieter in Manchurian forest rivers.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Scaly-sided Merganser
Breeds in southern Russia, northern China, and the Russian Far East. Winters in southern China and Korea. Found on fast-flowing forested rivers.
Estado de conservación
Brent Goose
Scaly-sided Merganser
How to Tell Them Apart
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
Scaly-sided Merganser
Male has iridescent dark green head with long flat crest, white body with distinctive black scaly pattern on flanks, and black back with white patches. Female has brownish-red crested head …
About These Birds
Brent Goose
El barnacla brenta o barnacla negruzca es un pequeño ganso marino de color negro y gris oscuro con un pequeño parche blanco a los lados del cuello. Cría en la tundra ártica y migra a zonas costeras templadas del hemisferio norte en invierno, donde se alimenta principalmente de zostera, un tipo de hierba marina. Es el único ganso que pasa el invierno en ambientes exclusivamente marinos.
Scaly-sided Merganser
El merganso escamoso es un merganso del este de Asia en peligro de extinción que cría en el lejano oriente ruso y el nordeste de China. El macho tiene la cabeza de color verde-negro brillante con un largo moño y los flancos color crema finamente escamados. Habita en ríos y arroyos forestales limpios, y pasa el invierno en ríos del este y centro de China.